25787081 has 2 divisors, whose sum is σ = 25787082. Its totient is φ = 25787080.

The previous prime is 25787063. The next prime is 25787171. The reversal of 25787081 is 18078752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25593481 + 193600 = 5059^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 25787081 - 2¹⁴ = 25770697 is a prime.

It is a super-2 number, since 2×25787081² = 1329947093001122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25787681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12893540 + 12893541.

It is an arithmetic number, because the mean of its divisors is an integer number (12893541).

Almost surely, 2^25787081 is an apocalyptic number.

It is an amenable number.

25787081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25787081 is an equidigital number, since it uses as much as digits as its factorization.

25787081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 25787081 is about 5078.0981676214. The cubic root of 25787081 is about 295.4387075921.

The spelling of 25787081 in words is "twenty-five million, seven hundred eighty-seven thousand, eighty-one".